The period of the output waveform for the circuit of figure

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The period of the output waveform for the circuit of figure shown, when triggered by a negative pulse is

1. 0.75 ms
2. 0.825 ms
3. 0.525 ms
4. 1.5 ms

Correct Option: B

T = (1.1) R_AC
= 1.1(7.5 × 10³) (0.1 × 10^{– 6}) = 0.825 ms.